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Controllable synthesis of silver nanoparticles by three-phase flow pulsating hybrid microfluidic chip

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Document pages: 14 pages

Abstract: Based on the mechanism of liquid phase reduction, a new method for preparing silver nanoparticles by piezoelectric driven three-phase flow pulsating hybrid microfluidic chip is proposed. In order to study and explore the effects of different factors on the synthesis of AgNPs, a series of related synthesis experiments were carried out. The corresponding experimental conditions include the concentration of sodium hydroxide and reducing agent solution, the amount of polyvinylpyrrolidone (PVP), inlet flow rate and synthesis temperature. The synthesized silver nanoparticles were characterized by UV-Vis absorption spectrophotometer and transmission electron microscope. The effects of different experimental conditions on the controllable synthesis of AgNPs were analyzed, and the optimum synthesis conditions were proposedum synthesis conditions of AgNPs were obtained. Experimental results show that the spherical AgNPs with an average particle diameter of about 29 nm, high yield, fine morphology, and good monodispersity were synthesized using the microfluidic chip under the conditions of the working frequency (200 Hz), the initial concentration of silver nitrate (1 mM), the synthesis temperature (80°C), the concentration ratio of sodium hydroxide to silver nitrate (2 : 1), the concentration ratio of glucose to silver nitrate (4 : 1), the inlet flow rate (3.5 ml min), and the quality ratio of PVP to silver (more than 1 : 1). The related research shows that it is an efficient synthesis method to develop the controllable synthesis experiments of AgNPs under multifactors using the three-phase pulsating mixing microfluidic chip.

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